Eevee: Lookdev: Fix memleak

source/blender/draw/engines/eevee/eevee_lookdev.c

@@ -86,6 +86,9 @@ void EEVEE_lookdev_cache_init(
 
 				stl->lookdev_lightcache = EEVEE_lightcache_create(1, 1, cube_res, vis_res, (int[3]){grid_res, grid_res, 1});
 
+				/* XXX: Fix memleak. TODO find out why. */
+				MEM_SAFE_FREE(stl->lookdev_cube_mips);
+
 				/* We do this to use a special light cache for lookdev.
 				 * This lightcache needs to be per viewport. But we need to
 				 * have correct freeing when the viewport is closed. So we